INTEREST REVENUE AND EXPENSE (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest revenue
Loan interest, including fees	$ 45,580	$ 47,712	$ 49,466
Deposits with banks	1,026	1,261	1,742
Federal funds sold and securities borrowed or purchased under agreements to resell	2,566	3,418	3,631
Investments, including dividends	6,919	7,525	8,320
Trading account assets	6,277	6,802	8,186
Other interest	602	580	513
Total interest revenue	62,970	67,298	71,858
Interest expense
Deposits	6,236	7,690	8,531
Federal funds purchased and securities loaned or sold under agreements to repurchase	2,339	2,817	3,197
Trading account liabilities	169	190	408
Short-term borrowings	597	727	650
Long-term debt	6,836	9,188	11,423
Total interest expense	16,177	20,612	24,209
Net interest revenue	46,793	46,686	47,649
Provision for loan losses	7,604	10,458	11,336
Net interest revenue after provision for loan losses	39,189	36,228	36,313
Insurance fees and charges	$ 1,132	$ 1,262	$ 1,332